jerk verb

ADV. suddenly | sharply, violently | convulsively, spasmodically | away, back, backwards, downwards, forward, round, up, upright, upwards She suddenly jerked her hand away. His head jerked up.

PHRASES jerk awake The train stopped and she jerked awake. | jerk sth open He jerked the door open. | jerk to a halt/stop The bus jerked to a stop.